ARCHIVED REPORTS XR0003296 - Laserfiche WebLink

Home Browse Search

WEISS ASSWATES 2 BACKGROUND The DWG plant is located northeast of the intersection of Charter Way and South Diamond Street in Stockton, California (Figure 1) The faculty is a walnut processing plant, cooperatively owned by walnut growers in the Central Valley DWG indicates that the plant has been in operation since the 1950s The five underground concrete vaults are located north and east of the main processing building and formerly contained refrigerants used in the plant ' walnut cooling systems (Figure 2) Detailed descriptions of the vault use and history are included in WA's July 20, 1988 Phase I investigation work plan (Weiss, 1988) ' 21 SITE SETTING The site is located approximately 2 5 miles cast of the San Joaquin River The direction of surface drainage at the site is controlled by the site topography, which slopes to the south toward Mormon Slough The Mormon Slough flows to the west and eventually empties into the ' San Joaquin River tFour municipal wells located at the corners of the site(Figure 2)supply water to the plant and to the surrounding community A representative of the City of Stockton Department of ' Municipal Utilities has indicated that the wells were installed in 1955 and 1956 to depths of 420 ft to 460 ft below ground surface (bgs) The wells are sealed to at least 50 ft bgs ' In 1988, the static water levels in the municipal wells indicated that ground water t beneath the site was approximately 50 ft to 60 ft bgs Since the direction of groundwater flow in the Stockton area generally coincides with the surface topography, the shallow ground water flow direction beneath the site is estimated to be towards the west However, the shallow ' ground water flow direction could be greatly affected by extraction of ground water from the j municipal wells, which may cause the shallow ground water to flow towards the pumping weli(s) ' D \ALL1331DWG\331P1SE0 WP Page 6